刘高峰, 张震, 曹运兴, 等.不同体积分数CS2溶液对煤的增渗试验研究[J].河南理工大学学报（自然科学版）,2022,41(5):8-16.

LIU G F, ZHANG Z, CAO Y X, et al.Experimental investigation on enhanced permeability of coal by CS2 with different volume fractions[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(5):8-16.

不同体积分数CS₂溶液对煤的增渗试验研究

刘高峰1,2,3, 张震1,2, 曹运兴1,2,3, 鲜保安1,2,3, 张洲1,2,3, 郭飞1,2

1.河南理工大学 煤层气/瓦斯地质工程研究中心，河南 焦作  454000;2.河南省非常规能源与开发国际联合实验室，河南 焦作  454000;3.中原经济区煤层（页岩）气河南省协同创新中心，河南 焦作  454000

摘要:为了研究CS₂溶液的环保、经济和增渗综合作用效果，以河南焦作赵固矿无烟煤为研究对象，无水乙醇作为混合剂，开展不同体积分数CS₂溶液对煤的增渗试验研究。结果表明：经不同体积分数CS₂溶液萃取后的煤样，渗透率从原始的0.000 16～0.001 33 mD增加到0.000 18～0.022 16 mD，增渗率提高了37.31%～1 566.17%；煤样端面裂隙的面密度与增渗率随CS₂体积分数的增大均不断增大，CS₂体积分数达到50%时，煤样的增渗效果出现了转折点，即体积分数小于50%时，增渗率随体积分数增大而提高，但增幅相对较小，与之相反，体积分数大于50%时，增渗率随体积分数增大大幅提高。煤样的物质组成、化学结构和CS₂萃取煤中的物质不同，是造成不同体积分数CS₂萃取后煤样增渗效果差异的主要原因。

关键词:二硫化碳;体积分数;煤;溶剂萃取;增渗

doi:10.16186/j.cnki.1673-9787.2020060063

基金项目: ：国家科技重大专项项目（2017ZX05064002）；国家自然科学基金资助项目（41302126）

收稿日期:2020/06/21

修回日期:2020/10/15

出版日期:2022/09/25

Experimental investigation on enhanced permeability of coal by CS₂ with different volume fractions

LIU Gaofeng1,2,3, ZHANG Zhen1,2, CAO Yunxing1,2,3, XIAN Baoan1,2,3, ZHANG Zhou1,2,3, GUO Fei1,2

1.Gas Geology Engineering Research Center，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.Henan International Joint Laboratory for Unconventional Energy Geology and Development，Jiaozuo  454000，Henan，China;3.Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region，Henan Province，Jiaozuo  454000，Henan，China

Abstract:In order to research the comprehensive effects of CS₂ on environmental protection，economy and permeability enhancement，the anthracite coal sample from Zhaogu Mine of Jiaozuo in Henan Province was selected to conduct the experiments by CS₂ with different volume fractions.The results indicated that the permeability of the modified coal samples had increased from 0.000 16～0.001 33 mD to 0.000 18～0.022 16 mD，and the ratio of the enhanced permeability rised from 37.31% to 1566~17%.Furthermore，the areal density of fractures was improved at the end surface and the enhanced permeability ratio of coal samples was promoted with the volume fraction of CS₂.A turning point exited on the permeability enhancement effect of coal sample at 50% volume fraction of CS₂.The permeability enhancement ratio increased with the volume fraction，but the growth was relatively small when the volume faction was less than 50%.On the contrary，the permeability enhancement ratio increased quickly with the volume fraction larger than 50%.In conclusion，the main reasons for the difference of the permeability enhancement effect were due to the material composition and chemical structure of the coal sample，in addition to different substances extracted from the coals by CS₂.

Key words:CS₂;volume fraction;coal;solvent extraction;enhanced permeability

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